to strengthen
Regular verb: strengthen - strengthened- strengthened

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I do not strengthen
you do not strengthen
she doesnot strengthen
we do not strengthen
you do not strengthen
they do not strengthen 	Iamnot strengthening
youarenot strengthening
sheisnot strengthening
wearenot strengthening
youarenot strengthening
theyarenot strengthening	I did not strengthen
you did not strengthen
she did not strengthen
we did not strengthen
you did not strengthen
they did not strengthen 	Iwasnot strengthening
youwerenot strengthening
shewasnot strengthening
wewerenot strengthening
youwerenot strengthening
theywerenot strengthening	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I have not strengthened
you have not strengthened
shehasnot strengthened
we have not strengthened
you have not strengthened
they have not strengthened	I have not  been strengthening
you have not  been strengthening
shehasnot  been strengthening
we have not  been strengthening
you have not  been strengthening
they have not  been strengthening	I had not strengthened
you had not strengthened
she had not strengthened
we had not strengthened
you had not strengthened
they had not strengthened	I had not been strengthening
you had not been strengthening
she had not been strengthening
we had not been strengthening
you had not been strengthening
they had not been strengthening	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I will not strengthen
you will not strengthen
she will not strengthen
we will not strengthen
you will not strengthen
they will not strengthen 	I will not be strengthening
you will not be strengthening
she will not be strengthening
we will not be strengthening
you will not be strengthening
they will not be strengthening	I will not have strengthened
you will not have strengthened
she will not have strengthened
we will not have strengthened
you will not have strengthened
they will not have strengthened	I will not have been strengthening
you will not have been strengthening
she will not have been strengthening
we will not have been strengthening
you will not have been strengthening
they will not have been strengthening	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I would not strengthen
you would not strengthen
she would not strengthen
we would not strengthen
you would not strengthen
they would not strengthen 	I would not be strengthening
you would not be strengthening
she would not be strengthening
we would not be strengthening
you would not be strengthening
they would not be strengthening	I would not have strengthened
you would not have strengthened
she would not have strengthened
we would not have strengthened
you would not have strengthened
they would not have strengthened	I would not have been strengthening
you would not have been strengthening
she would not have been strengthening
we would not have been strengthening
you would not have been strengthening
they would not have been strengthening	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to strengthen 	 	do not strengthen
Let's not strengthen
do not strengthen 	 	

Participle 	
Present 	Past 	 	 	
strengthening	strengthened